Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

If you’ve ever woken up to your partner laughing about something you said in your sleep, you’re not alone. Sleep talking—also known as somniloquy—is a common sleep behavior that can range from ...

Sleep talking might sound funny, but it’s often a sign of something deeper. It starts with a mumble. Maybe a laugh. Sometimes even a full-blown rant. But the person lying next to you has no idea they ...